| Value | Category | 
                                    
                    
                        | -9 | Don't know (spontaneous) | 
                                    
                    
                        |  |  | 
                                    
                    
                        | 110 |  | 
                                    
                    
                        | 120 |  | 
                                    
                    
                        | 150 |  | 
                                    
                    
                        | 180 |  | 
                                    
                    
                        | 200 |  | 
                                    
                    
                        | 214 |  | 
                                    
                    
                        | 240 |  | 
                                    
                    
                        | 250 |  | 
                                    
                    
                        | 300 |  | 
                                    
                    
                        | 312 |  | 
                                    
                    
                        | 350 |  | 
                                    
                    
                        | 351 |  | 
                                    
                    
                        | 360 |  | 
                                    
                    
                        | 380 |  | 
                                    
                    
                        | 384 |  | 
                                    
                    
                        | 400 |  | 
                                    
                    
                        | 420 |  | 
                                    
                    
                        | 432 |  | 
                                    
                    
                        | 450 |  | 
                                    
                    
                        | 480 |  | 
                                    
                    
                        | 500 |  | 
                                    
                    
                        | 508 |  | 
                                    
                    
                        | 540 |  | 
                                    
                    
                        | 560 |  | 
                                    
                    
                        | 576 |  | 
                                    
                    
                        | 600 |  | 
                                    
                    
                        | 620 |  | 
                                    
                    
                        | 650 |  | 
                                    
                    
                        | 660 |  | 
                                    
                    
                        | 700 |  | 
                                    
                    
                        | 720 |  | 
                                    
                    
                        | 750 |  | 
                                    
                    
                        | 780 |  | 
                                    
                    
                        | 792 |  | 
                                    
                    
                        | 800 |  | 
                                    
                    
                        | 840 |  | 
                                    
                    
                        | 850 |  | 
                                    
                    
                        | 868 |  | 
                                    
                    
                        | 900 |  | 
                                    
                    
                        | 912 |  | 
                                    
                    
                        | 950 |  | 
                                    
                    
                        | 960 |  | 
                                    
                    
                        | 970 |  | 
                                    
                    
                        | 1000 |  | 
                                    
                    
                        | 1020 |  | 
                                    
                    
                        | 1050 |  | 
                                    
                    
                        | 1080 |  | 
                                    
                    
                        | 1100 |  | 
                                    
                    
                        | 1160 |  | 
                                    
                    
                        | 1200 |  | 
                                    
                    
                        | 1225 |  | 
                                    
                    
                        | 1300 |  | 
                                    
                    
                        | 1320 |  | 
                                    
                    
                        | 1380 |  | 
                                    
                    
                        | 1400 |  | 
                                    
                    
                        | 1500 |  | 
                                    
                    
                        | 1560 |  | 
                                    
                    
                        | 1600 |  | 
                                    
                    
                        | 1800 |  | 
                                    
                    
                        | 1896 |  | 
                                    
                    
                        | 1900 |  | 
                                    
                    
                        | 2000 |  | 
                                    
                    
                        | 2100 |  | 
                                    
                    
                        | 2250 |  | 
                                    
                    
                        | 2400 |  | 
                                    
                    
                        | 2493 |  | 
                                    
                    
                        | 2500 |  | 
                                    
                    
                        | 2600 |  | 
                                    
                    
                        | 2700 |  | 
                                    
                    
                        | 2800 |  | 
                                    
                    
                        | 3000 |  | 
                                    
                    
                        | 3081 |  | 
                                    
                    
                        | 3200 |  | 
                                    
                    
                        | 3233 |  | 
                                    
                    
                        | 3351 |  | 
                                    
                    
                        | 3500 |  | 
                                    
                    
                        | 3600 |  | 
                                    
                    
                        | 3800 |  | 
                                    
                    
                        | 4000 |  | 
                                    
                    
                        | 4090 |  | 
                                    
                    
                        | 4200 |  | 
                                    
                    
                        | 4500 |  | 
                                    
                    
                        | 4800 |  | 
                                    
                    
                        | 5000 |  | 
                                    
                    
                        | 5300 |  | 
                                    
                    
                        | 5400 |  | 
                                    
                    
                        | 5580 |  | 
                                    
                    
                        | 5700 |  | 
                                    
                    
                        | 6000 |  | 
                                    
                    
                        | 6100 |  | 
                                    
                    
                        | 6244 |  | 
                                    
                    
                        | 6500 |  | 
                                    
                    
                        | 6684 |  | 
                                    
                    
                        | 7000 |  | 
                                    
                    
                        | 7200 |  | 
                                    
                    
                        | 7500 |  | 
                                    
                    
                        | 7693 |  | 
                                    
                    
                        | 8000 |  | 
                                    
                    
                        | 8500 |  | 
                                    
                    
                        | 9000 |  | 
                                    
                    
                        | 9400 |  | 
                                    
                    
                        | 9600 |  | 
                                    
                    
                        | 10000 |  | 
                                    
                    
                        | 10080 |  | 
                                    
                    
                        | 10300 |  | 
                                    
                    
                        | 11440 |  | 
                                    
                    
                        | 12000 |  | 
                                    
                    
                        | 13000 |  | 
                                    
                    
                        | 14000 |  | 
                                    
                    
                        | 15000 |  | 
                                    
                    
                        | 16000 |  | 
                                    
                    
                        | 17000 |  | 
                                    
                    
                        | 18000 |  | 
                                    
                    
                        | 18500 |  | 
                                    
                    
                        | 19000 |  | 
                                    
                    
                        | 20000 |  | 
                                    
                    
                        | 21000 |  | 
                                    
                    
                        | 22000 |  | 
                                    
                    
                        | 24000 |  | 
                                    
                    
                        | 25000 |  | 
                                    
                    
                        | 26000 |  | 
                                    
                    
                        | 28000 |  | 
                                    
                    
                        | 30000 |  | 
                                    
                    
                        | 30706 |  | 
                                    
                    
                        | 31000 |  | 
                                    
                    
                        | 36000 |  | 
                                    
                    
                        | 40000 |  | 
                                    
                    
                        | 48000 |  | 
                                    
                    
                        | 50000 |  | 
                                    
                    
                        | 57000 |  | 
                                    
                    
                        | 60000 |  | 
                                    
                    
                        | 100000 |  | 
                                    
                    
                        | 120000 |  | 
                                    
                    
                        | 122000 |  | 
                                    
                    
                        | 140000 |  | 
                                    
                    
                        | 150000 |  | 
                                    
                    
                        | 180000 |  | 
                                    
                    
                        | 200000 |  | 
                                    
                    
                        | 205000 |  | 
                                    
                    
                        | 300000 |  | 
                                    
                    
                        | 400000 |  | 
                                    
                    
                        | 450000 |  | 
                                    
                    
                        | 540000 |  | 
                                    
                    
                        | 1000000 |  | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.